In and on our body's head, the Nasal Region (Nose Region), featuring both the external nose as the organ protruding from the face which houses the nostrils that admits and expels air for respiration in conjunction with the oral cavity, and the nasal cavities, situated behind the external nose where resides the olfactory mucosa and sinuses, in which air passes through to the pharynx. In and on our body's head, the Nasal Region (Nose Region) functions are shared between both the digestive system, and the lower respiratory system. The nose wrinkle is one of the facial expressions of the nose region associated with either irritating or offensive smells and, to some extent, bad tastes.

In our body's mouth (oral cavity), Teeth are part of the Skeletal System not counted as bones. Each tooth may be described as a nonshedding hard surface, made of enamel and dentin that offers many different sites for bacteria colonization both below (subgingival) and above (supragingival) the gingival margin.

In our body's Brain, as a neural structure located in the head, differs from a ganglion by the following characteristics; a brain subserves the entire body, not just restricted segments, it has functionally specialized parts, it is bilobar, commissures and neurons form the surface with axons in the central core, interneurons are more numerous than primary motor or primary sensory neurons, and it has multisynaptics rather than predominately monosynaptic circuits.

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“Tongue”

In our body, the Tongue, mainly made up of muscles covered with a mucus membrane, covering the upper surface are small bumps (papillae) that provide friction and contain the taste buds. In our body's mouth (oral cavity), the Tongue manipulates food in the mouth which helps chewing and swallowing, and is useful in vocalization.

In our body's mouth, the Tongue, as the primary organ of taste, with much of the upper surface of the tongue is covered in both papillae and taste buds.
In our body, the Tongue is sensitive and kept moist by saliva, and is richly supplied with nerves and blood vessels.
In our body, the Tongue a secondary function of the tongue is phonetic articulation. The tongue also serves as a natural means of cleaning one's teeth.

On our body's head, the Face has uses of expression, appearance, and identity amongst others, including the use of different senses like olfaction, taste, hearing, and vision.

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“Scalp”

On our body's head, the Scalp, the outer covering of the calvaria, is the anatomical area bordered by the face anteriorly and the neck to the sides and posteriorly. On our body's head, the Scalp is composed of several layers: (1) skin, (2) subcutaneous fat, (3) galea aponeurotica, (4) loose areolar tissue, and (5) pericranium. The scalp integument is the thickest skin in the body.

On each side of our body's head, the Orbit (Eye Socket) is a facial bone cavity (socket) of the skull, in which the eye and its appendages are situated. "Orbit" may refer to the bony socket. In our body, the Orbits are conical or four-sided pyramidal cavities, which open into the midline of the face and point back into the head, each orbit consists of a base, an apex and four walls.

In our body's central nervous system surrounding the brain and spinal cord, the Meninges are a triple layered membrane system consisting of thin protective membranous coverings of connective tissue that covers the brain and spinal cord, within the dorsal cavity it suspends the brain within the skull (cranium) preventing the brain from pressing against the skull's inner surface.

In our body's head, the brain swims in three membranes. The first outer layer of the brain is the “Dura Mater”. The next layer is the “Arachnoid Membrane” , called the arachnoid because of it's spider web appearance where cereal spinal fluid flows (the blood of the brain that is basically protein) so neurons can flow from the brain to the spinal cord which also gets blood into the brain through the sub arachnoid space as well as paths to cranial nerves. The “Pia Mater” is the root of the nervous system, which supplies the brain with blood and connects via the arachnoid trabecula.

In our body, the Meninges, as a membrane system, lines the insides of the bones protecting both the brain and spinal cord from physical impact, with a protective padding and containment of the cerebrospinal fluid (CSF) in which the central nervous system floats.

In our body's neck, the Thyroid Gland, located inferior to (below) the thyroid cartilage (adam's apple) and at approximately the same level as the cricoid cartilage, is a small (weighing less than one ounce), butterfly-shaped endocrine gland consisting of two lobes connected by an isthmus, ,situated at the front and sides of the neck, anterior to the trachea, just inferior to the larynx, and behind the sternohyoid and thyrohyoid muscles.

In our body's neck, the Thyroid Gland is a highly vascular organ, deriving its blood from the superior and inferior thyroid arteries, and produces hormones that stimulate body heat production, bone growth, and the body's metabolism

In our body, the Parathyroid Hormone is the most important regulator of blood calcium (Ca) levels. The hormone is secreted in response to low blood calcium levels, and its effect is to increase those levels.

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